1.php uses mysqldump to back up the database, the code is as follows:
<?php /** * 数据库备份 */ $sqlname = $argv[1]; //接受bat或cmd传过来的第一个参数 要备份的数据库名 $day = $argv[2]; //接受bat或cmd传过来的第一个参数 备份数据保存天数 /*备份保存$day天,老数据删除*/ $old = 'e:/wamp/db_backup/'.date('Ymd',strtotime("-".$day." day")).$sqlname.'.sql'; if(file_exists($old)){ unlink($old); } //备份数据库 $filepath = 'e:/wamp/db_backup/'.date('Ymd').$sqlname.'.sql'; $sql = 'mysqldump --no-defaults -uroot -p*** '.$sqlname.' > '.$filepath; exec($sql); ?>
2. Run the above php file through bat, the content of the bat file is as follows:
<code><span>e:/wamp/php5<span>.4<span>.44/php<span>.exe e:/wamp/backup<span>.php zzy <span>30</span></span></span></span></span></span></code>
Among them:
e:/wamp/php5.4.44/php.exe: PHP installation path;
e:/wamp/backup.php: PHP file to be run;
zzy: Database to be backed up;
30: Number of days to save backup data.
3. Just add the bat file to the scheduled task.
The above introduces the daily scheduled backup of mysql in windows2003 server, including the content. I hope it will be helpful to friends who are interested in PHP tutorials.

Effective methods to prevent session fixed attacks include: 1. Regenerate the session ID after the user logs in; 2. Use a secure session ID generation algorithm; 3. Implement the session timeout mechanism; 4. Encrypt session data using HTTPS. These measures can ensure that the application is indestructible when facing session fixed attacks.

Implementing session-free authentication can be achieved by using JSONWebTokens (JWT), a token-based authentication system where all necessary information is stored in the token without server-side session storage. 1) Use JWT to generate and verify tokens, 2) Ensure that HTTPS is used to prevent tokens from being intercepted, 3) Securely store tokens on the client side, 4) Verify tokens on the server side to prevent tampering, 5) Implement token revocation mechanisms, such as using short-term access tokens and long-term refresh tokens.

The security risks of PHP sessions mainly include session hijacking, session fixation, session prediction and session poisoning. 1. Session hijacking can be prevented by using HTTPS and protecting cookies. 2. Session fixation can be avoided by regenerating the session ID before the user logs in. 3. Session prediction needs to ensure the randomness and unpredictability of session IDs. 4. Session poisoning can be prevented by verifying and filtering session data.

To destroy a PHP session, you need to start the session first, then clear the data and destroy the session file. 1. Use session_start() to start the session. 2. Use session_unset() to clear the session data. 3. Finally, use session_destroy() to destroy the session file to ensure data security and resource release.

How to change the default session saving path of PHP? It can be achieved through the following steps: use session_save_path('/var/www/sessions');session_start(); in PHP scripts to set the session saving path. Set session.save_path="/var/www/sessions" in the php.ini file to change the session saving path globally. Use Memcached or Redis to store session data, such as ini_set('session.save_handler','memcached'); ini_set(

TomodifydatainaPHPsession,startthesessionwithsession_start(),thenuse$_SESSIONtoset,modify,orremovevariables.1)Startthesession.2)Setormodifysessionvariablesusing$_SESSION.3)Removevariableswithunset().4)Clearallvariableswithsession_unset().5)Destroythe

Arrays can be stored in PHP sessions. 1. Start the session and use session_start(). 2. Create an array and store it in $_SESSION. 3. Retrieve the array through $_SESSION. 4. Optimize session data to improve performance.

PHP session garbage collection is triggered through a probability mechanism to clean up expired session data. 1) Set the trigger probability and session life cycle in the configuration file; 2) You can use cron tasks to optimize high-load applications; 3) You need to balance the garbage collection frequency and performance to avoid data loss.


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